<!doctype html>
<html ng-app>
<head>
    <script src="http://code.angularjs.org/1.2.25/angular.min.js"></script>
    <script src="http://code.angularjs.org/1.2.25/angular-animate.min.js"></script>
</head>
<body>
<div ng-init="checked=true">
    <label>
        <input type="checkbox" ng-model="checked" style="float:left; margin-right:10px;"> Is visible
    </label>
    <div class="check-element animate-show-hide" ng-show="checked" style="clear:both;">
        Content......
    </div>
</div>
</body>
</html>